21009211431

Names of 21009211431

• Cardinal: 21009211431 can be written as Twenty-one billion, nine million, two hundred eleven thousand, four hundred thirty-one.

Scientific notation

• Scientific notation: 2.1009211431 × 10¹⁰

Factors of 21009211431

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 6
• Sum of prime factors: 1124

Divisors of 21009211431

• Number of divisors d(n): 64
• Complete list of divisors:
  1 3 13 39 41 109 123 149 327 447 533 809 1417 1599 1937 2427 4251 4469 5811 6109 10517 13407 16241 18327 31551 33169 48723 58097 79417 88181 99507 120541 174291 211133 238251 264543 361623 431197 633399 665881 1146353 1293591 1567033 1997643 3439059 3615421 4701099 4942181 8656453 10846263 13138969 14826543 25969359 39416907 47000473 64248353 141001419 170806597 192745059 512419791 538697729 1616093187 7003070477 21009211431
• Sum of all divisors σ(n): 31434480000
• Sum of proper divisors (its aliquot sum) s(n): 10425268569
• 21009211431 is a deficient number, because the sum of its proper divisors (10425268569) is less than itself. Its deficiency is 10583942862

Bases of 21009211431

• Binary: 10011100100001111110010000000100111₂
• Hexadecimal: 0x4E43F2027
• Base-36: 9NGCBAF

Squares and roots of 21009211431

• 21009211431 squared (21009211431²) is 441386964952461067761
• 21009211431 cubed (21009211431³) is 9273192069573641436386866775991
• The square root of 21009211431 is 144945.5464338245
• The cube root of 21009211431 is 2759.3275085205

Scales and comparisons

• 21,009,211,431 seconds is equal to 668 years, 1 week, 3 days, 4 hours, 3 minutes, 51 seconds.
• To count from 1 to 21,009,211,431 would take you about one thousand, three hundred thirty-six years!

  This is a very rough estimate, based on a speaking rate of half a second every third order of magnitude. If you speak quickly, you could probably say any randomly-chosen number between one and a thousand in around half a second. Very big numbers obviously take longer to say, so we add half a second for every extra x1000. (We do not count involuntary pauses, bathroom breaks or the necessity of sleep in our calculation!)

• A cube with a volume of 21009211431 cubic inches would be around 229.9 feet tall.

Recreational maths with 21009211431

• 21009211431 backwards is 13411290012
• The number of decimal digits it has is: 11
• The sum of 21009211431's digits is 24
• More coming soon!